Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.61% |
| 2 | Consumer Discretionary | 0.43% |
| 3 | Healthcare | 0.35% |
| 4 | Communication Services | 0.23% |
| 5 | Financials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6401
Idacorp
IDA
$8.36B
| $91K | ﹤0.01% |
+806
| New | +$85.8K |
|
6402
iShares MSCI Saudi Arabia ETF
KSA
$626M
| $91K | ﹤0.01% |
2,235
+475
| +27% | +$20K |
|
|
CYPH
6403
Cypherpunk Technologies Inc
CYPH
$73.5M
| $91K | ﹤0.01% |
+2,816
| New | +$78.1K |
|
6404
MasterCraft Boat Holdings
MCFT
$608M
| $91K | ﹤0.01% |
3,235
+3,068
| +1,837% | +$83.8K |
|
6405
MakeMyTrip
MMYT
$5.95B
| $91K | ﹤0.01% |
3,296
-6,309
| -66% | -$188K |
|
6406
CALL
NNN REIT
NNN
$8.97B
| $91K | ﹤0.01% |
1,900
-18,900
| -91% | -$867K |
|
6407
CALL
Fidelity Nasdaq Composite Index ETF
ONEQ
$10.9B
| $91K | ﹤0.01% |
+1,500
| New | +$89.9K |
|
6408
PUT
Essential Utilities
WTRG
$11.2B
| $91K | ﹤0.01% |
1,700
-4,200
| -71% | -$204K |
|
|
BECN
6409
PUT
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $91K | ﹤0.01% |
1,600
-31,600
| -95% | -$1.7M |
|
|
GRTS
6410
PUT
DELISTED
Gritstone bio, Inc. Common Stock
GRTS
| $91K | ﹤0.01% |
7,100
+6,300
| +788% | +$69.8K |
|
|
JOAN
6411
PUT
DELISTED
JOANN, Inc. Common Stock
JOAN
| $91K | ﹤0.01% |
8,800
-2,200
| -20% | -$23K |
|
|
YELL
6412
DELISTED
Yellow Corporation Common Stock
YELL
| $91K | ﹤0.01% |
7,242
-40,016
| -85% | -$436K |
|
|
AZPN
6413
CALL
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $91K | ﹤0.01% |
600
-7,500
| -93% | -$1.14M |
|
6414
Advantage Solutions
ADV
$555M
| $90K | ﹤0.01% |
450
-586
| -57% | -$120K |
|
6415
Allegion
ALLE
$14.1B
| $90K | ﹤0.01% |
+687
| New | +$89.9K |
|
6416
PUT
AerSale
ASLE
$308M
| $90K | ﹤0.01% |
+5,100
| New | +$95.1K |
|
|
AZUL
6417
DELISTED
Azul
AZUL
| $90K | ﹤0.01% |
6,821
-13,521
| -66% | -$205K |
|
6418
PUT
CareDx
CDNA
$2.44B
| $90K | ﹤0.01% |
2,000
+700
| +54% | +$36.5K |
|
6419
CALL
Corvus Pharmaceuticals
CRVS
$1.17B
| $90K | ﹤0.01% |
37,400
+31,300
| +513% | +$121K |
|
6420
CALL
Eton Pharmaceutcials
ETON
$1.26B
| $90K | ﹤0.01% |
21,000
+11,000
| +110% | +$52.6K |
|
6421
EverQuote
EVER
$844M
| $90K | ﹤0.01% |
5,801
+2,363
| +69% | +$36K |
|
6422
First Commonwealth Financial
FCF
$2.22B
| $90K | ﹤0.01% |
5,614
-599
| -10% | -$9.09K |
|
6423
IDT Corp
IDT
$1.67B
| $90K | ﹤0.01% |
+2,043
| New | +$104K |
|
|
SANW
6424
DELISTED
S&W Seed Co
SANW
| $90K | ﹤0.01% |
1,737
+1,455
| +516% | +$85K |
|
6425
PUT
Talos Energy
TALO
$2.38B
| $90K | ﹤0.01% |
9,200
+3,800
| +70% | +$43.3K |
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading withdrew a net $10.8B in Q4 2021, closing 1,645 positions and reducing 4,258 holdings. Its most notable exit was Carnival Corporation Ltd, an estimated $30.5M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.61% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares China Large-Cap ETF worth $33M.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,645 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.